CXSD61054 fully in tegrated , high-efficiency 2.0A synchronous rectified step-down converter hi

目录WMG嘉泰姆

1.产品概述                       2.产品特点WMG嘉泰姆
3.应用范围                       4.下载产品资料PDF文档 WMG嘉泰姆
5.产品封装图                     6.电路原理图                   WMG嘉泰姆
7.功能概述                        8.相关产品WMG嘉泰姆

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一,产品概述(General Description)      WMG嘉泰姆

     The CXSD61054 is a fully in tegrated , high-efficiency  2.0A  synchronous  rectified step-down  converter.  The CXSD61054 operates at high efficiencyWMG嘉泰姆
over a wide output current load range.WMG嘉泰姆

      This device offers two operation modes,PWM control and PFM ModeWMG嘉泰姆
switching control, which allows a high efficiency over the wider range of theWMG嘉泰姆
load.The  rber of readily available standard external components and isWMG嘉泰姆
available in an 6-pin SOT23 ROHS compliant package.WMG嘉泰姆

二.产品特点(Features)WMG嘉泰姆

* High Efficiency: Up to 95%WMG嘉泰姆
* 600KHz Frequency OperationWMG嘉泰姆
* 2.0A Output CurrentWMG嘉泰姆
* No Schottky Diode RequiredWMG嘉泰姆
* 3.5V to 18V Input Voltage RangeWMG嘉泰姆
* 0.6V ReferenceWMG嘉泰姆
 Slope Compensated Current ModeWMG嘉泰姆
 Control for Excellent Line and LoadWMG嘉泰姆
 Transient ResponseWMG嘉泰姆
* Integrated internal compensationWMG嘉泰姆
* Stable with Low ESR Ceramic OutputWMG嘉泰姆
   CapacitorsWMG嘉泰姆
* Over Current Protection withWMG嘉泰姆
    Hiccup-ModeWMG嘉泰姆
* Input over voltage protection(OVP)WMG嘉泰姆
*  Thermal ShutdownWMG嘉泰姆
*  Inrush Current Limit and Soft StartWMG嘉泰姆
*  Available in SOT23-6 PackageWMG嘉泰姆
*  -40°C to +85°C Temperature RangeWMG嘉泰姆
三,应用范围 (Applications)WMG嘉泰姆

Distributed Power SystemsWMG嘉泰姆
Digital Set Top BoxesWMG嘉泰姆
Flat Panel Television and MonitorsWMG嘉泰姆
Wireless and DSL ModemsWMG嘉泰姆
Notebook ComputerWMG嘉泰姆
四.技术规格书下载（产品PDF）WMG嘉泰姆

需要详细的PDF规格书请扫一扫微信联系我们，还可以获得免费样品以及技术支持！WMG嘉泰姆

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五,产品封装图 (Package)WMG嘉泰姆

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六.电路原理图WMG嘉泰姆

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七,功能概述WMG嘉泰姆

Internal Regulator WMG嘉泰姆
The CXSD61054 is a current mode step down DC/DC converter that provides excellentWMG嘉泰姆
transient response with no extra external compensation components. This device containsWMG嘉泰姆
an internal, low resistance, high voltage power MOSFET, and operates at a high 600KWMG嘉泰姆
operating frequency to ensure a compact, high efficiency design with excellent AC and DCWMG嘉泰姆
performance.WMG嘉泰姆

Error AmplifierWMG嘉泰姆
The error amplifier compares the FB pin voltage with the internal FB reference (VFB) andWMG嘉泰姆
outputs a current proportional to the difference between the two. This output current is thenWMG嘉泰姆
used to charge or discharge the internal compensation network to form the COMP voltage,WMG嘉泰姆
which is used to control the power MOSFET current. The optimized internal compensationWMG嘉泰姆
network minimizes the external component counts and simplifies the control loop design. WMG嘉泰姆
Internal Soft-StartWMG嘉泰姆
The soft-start is implemented to prevent the converter output voltage from overshootingWMG嘉泰姆
during startup. When the chip starts, the internal circuitry generates a soft-start voltage (SS)WMG嘉泰姆
ramping up from 0V to 0.6V. When it is lower than the internal reference (REF), SSWMG嘉泰姆
overrides REF so the error amplifier uses SS as the reference. When SS is higher thanWMG嘉泰姆
REF, REF regains control. The SS time is internally fixed to 1 ms.WMG嘉泰姆
Over-Current-Protection and HiccupWMG嘉泰姆
The CXSD61054 has cycle-by-cycle over current limit when the inductor current peak valueWMG嘉泰姆
exceeds the set current limit threshold. Meanwhile, output voltage starts to drop until FB isWMG嘉泰姆
below the Under-Voltage (UV) threshold, typically 30% below the reference. Once a UV isWMG嘉泰姆
triggered, the CXSD61054 enters hiccup mode to periodically restart the part. ThisWMG嘉泰姆
protection mode is especially useful when the output is dead-short to ground. The averageWMG嘉泰姆
short circuit current is greatly reduced to alleviate the thermal issue and to protect theWMG嘉泰姆
regulator. The CXSD61054 exits the hiccup mode once the over current condition isWMG嘉泰姆
removed. WMG嘉泰姆
Startup and Shutdown WMG嘉泰姆
If both VIN and EN are higher than their appropriate thresholds, the chip starts. TheWMG嘉泰姆
reference block starts first, generating stable reference voltage and currents, and then theWMG嘉泰姆
internal regulator is enabled. The regulator provides stable supply for the remainingWMG嘉泰姆
八,相关芯片选择指南               更多同类产品......WMG嘉泰姆